[ltp] Fan running constantly

[Henrique de Moraes Holschuh]

On Sun, 28 Sep 2008, Philipp Kern wrote:
> my Thinkpad fan got recently replaced and was very quiet afterwards.  In the
> meantime I upgraded kernels (but I'm not able to pinpoint it to that) and now
> the fans are humming pretty constantly.
> 
> asterix:/proc/acpi/ibm# cat thermal fan
> temperatures:	40 36 26 46 34 -128 30 -128 34 45 44 -128 -128 -128 -128 -128
> status:		enabled
> speed:		3081
> level:		auto

As usual, please provide us with the full thinkpad model and BIOS/EC
version, otherwise we can't very well comment on the values you get, can we?

It does look like a T43 or R52, though.  If it is, the fan is at the usual
speed.

> with the new that's gone.  Previously I also ran tp-fancontrol but as I

tp-fancontrol would certainly be able to run the fan at a lower level than
what the EC thinks is advised...

> currently lack thinkpad_acpi (or is that tp_smapi?) debugging support with the
> Debian kernel and with the fixed fan it's deactivated.  Now the speed is in

Hmm?  I am unaware of any problems with thinkpad-acpi in Debian's 2.6.2x
kernels, all you need is to give it fan_control=1 as a module parameter to
have fan control.  If it is a new enough thinkpad-acpi, you will even have
it available through lm-sensors (hwmon) as well as over /proc/acpi/ibm/fan.

> general just a tad too high for a laptop without any load...  Any ideas?

To me it looks like it is working the way IBM/Lenovo wants it to.  If you
disagree, you will have to use tp-fancontrol again.   Or enhance its cooling
a lot.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh